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Finding the Fourth Proportional to 952.60, 1,428.90 and 645.07

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Solution

The fourth proportional to 952.60, 1,428.90 and 645.07 is: 967.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.60 : 1,428.90 = 645.07 : x
  2. Step 2: Convert to fraction form
    952.60/1,428.90 = 645.07/x
  3. Step 3: Cross multiply
    952.60x = 1,428.90 × 645.07
  4. Step 4: Simplify right side
    952.60x = 921,740.52
  5. Step 5: Solve for x
    x = 921,740.52/952.60
  6. Step 6: Final answer
    x = 967.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.